Commit | Line | Data |
---|---|---|
79a9a2c2 | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, |
e2fafeb9 | 2 | * 2006, 2008, 2009, 2011, 2013, 2015 Free Software Foundation, Inc. |
79a9a2c2 | 3 | * |
73be1d9e | 4 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
5 | * modify it under the terms of the GNU Lesser General Public License |
6 | * as published by the Free Software Foundation; either version 3 of | |
7 | * the License, or (at your option) any later version. | |
fca75708 | 8 | * |
53befeb7 NJ |
9 | * This library is distributed in the hope that it will be useful, but |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
fca75708 | 13 | * |
73be1d9e MV |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 | * 02110-1301 USA | |
73be1d9e | 18 | */ |
1bbd0b84 | 19 | |
1bbd0b84 | 20 | |
fca75708 | 21 | \f |
dbb605f5 LC |
22 | #ifdef HAVE_CONFIG_H |
23 | # include <config.h> | |
24 | #endif | |
fca75708 | 25 | |
13070bd3 | 26 | #include <string.h> |
a16d4e82 | 27 | #include <stdarg.h> |
13070bd3 | 28 | |
a0599745 | 29 | #include "libguile/_scm.h" |
4e047c3e | 30 | #include "libguile/async.h" |
a0599745 MD |
31 | #include "libguile/ports.h" |
32 | #include "libguile/root.h" | |
33 | #include "libguile/smob.h" | |
00ffa0e7 | 34 | #include "libguile/hashtab.h" |
a0599745 MD |
35 | |
36 | #include "libguile/validate.h" | |
37 | #include "libguile/keywords.h" | |
cc95e00a MV |
38 | #include "libguile/strings.h" |
39 | ||
fca75708 MD |
40 | \f |
41 | ||
e7efe8e7 AW |
42 | static SCM keyword_obarray; |
43 | ||
e2fafeb9 AW |
44 | #define SCM_KEYWORDP(x) (SCM_HAS_TYP7 (x, scm_tc7_keyword)) |
45 | #define SCM_KEYWORD_SYMBOL(x) (SCM_CELL_OBJECT_1 (x)) | |
fca75708 | 46 | |
265a7997 MV |
47 | SCM_DEFINE (scm_keyword_p, "keyword?", 1, 0, 0, |
48 | (SCM obj), | |
49 | "Return @code{#t} if the argument @var{obj} is a keyword, else\n" | |
50 | "@code{#f}.") | |
51 | #define FUNC_NAME s_scm_keyword_p | |
52 | { | |
e2fafeb9 | 53 | return scm_from_bool (SCM_KEYWORDP (obj)); |
265a7997 MV |
54 | } |
55 | #undef FUNC_NAME | |
56 | ||
57 | SCM_DEFINE (scm_symbol_to_keyword, "symbol->keyword", 1, 0, 0, | |
58 | (SCM symbol), | |
59 | "Return the keyword with the same name as @var{symbol}.") | |
60 | #define FUNC_NAME s_scm_symbol_to_keyword | |
fca75708 | 61 | { |
86d31dfe | 62 | SCM keyword; |
fca75708 | 63 | |
d7212289 | 64 | SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol, 0, NULL, "symbol"); |
fca75708 | 65 | |
9de87eea | 66 | SCM_CRITICAL_SECTION_START; |
e2fafeb9 AW |
67 | /* Note: `scm_cell' and `scm_hashq_set_x' can raise an out-of-memory |
68 | error. */ | |
e7efe8e7 | 69 | keyword = scm_hashq_ref (keyword_obarray, symbol, SCM_BOOL_F); |
7888309b | 70 | if (scm_is_false (keyword)) |
fca75708 | 71 | { |
e2fafeb9 | 72 | keyword = scm_cell (scm_tc7_keyword, SCM_UNPACK (symbol)); |
e7efe8e7 | 73 | scm_hashq_set_x (keyword_obarray, symbol, keyword); |
fca75708 | 74 | } |
9de87eea | 75 | SCM_CRITICAL_SECTION_END; |
86d31dfe | 76 | return keyword; |
fca75708 | 77 | } |
1bbd0b84 | 78 | #undef FUNC_NAME |
fca75708 | 79 | |
265a7997 MV |
80 | SCM_DEFINE (scm_keyword_to_symbol, "keyword->symbol", 1, 0, 0, |
81 | (SCM keyword), | |
82 | "Return the symbol with the same name as @var{keyword}.") | |
83 | #define FUNC_NAME s_scm_keyword_to_symbol | |
430a6cc3 | 84 | { |
e2fafeb9 AW |
85 | SCM_VALIDATE_KEYWORD (1, keyword); |
86 | return SCM_KEYWORD_SYMBOL (keyword); | |
430a6cc3 | 87 | } |
265a7997 | 88 | #undef FUNC_NAME |
430a6cc3 | 89 | |
265a7997 MV |
90 | int |
91 | scm_is_keyword (SCM val) | |
fca75708 | 92 | { |
e2fafeb9 | 93 | return SCM_KEYWORDP (val); |
fca75708 MD |
94 | } |
95 | ||
265a7997 | 96 | SCM |
4db853d7 | 97 | scm_from_locale_keyword (const char *name) |
fca75708 | 98 | { |
4db853d7 | 99 | return scm_symbol_to_keyword (scm_from_locale_symbol (name)); |
fca75708 | 100 | } |
fca75708 | 101 | |
265a7997 | 102 | SCM |
4db853d7 | 103 | scm_from_locale_keywordn (const char *name, size_t len) |
265a7997 | 104 | { |
4db853d7 MW |
105 | return scm_symbol_to_keyword (scm_from_locale_symboln (name, len)); |
106 | } | |
107 | ||
108 | SCM | |
109 | scm_from_latin1_keyword (const char *name) | |
110 | { | |
111 | return scm_symbol_to_keyword (scm_from_latin1_symbol (name)); | |
112 | } | |
113 | ||
114 | SCM | |
115 | scm_from_utf8_keyword (const char *name) | |
116 | { | |
117 | return scm_symbol_to_keyword (scm_from_utf8_symbol (name)); | |
265a7997 | 118 | } |
fca75708 | 119 | |
a16d4e82 MW |
120 | SCM_SYMBOL (scm_keyword_argument_error, "keyword-argument-error"); |
121 | ||
122 | void | |
123 | scm_c_bind_keyword_arguments (const char *subr, SCM rest, | |
124 | scm_t_keyword_arguments_flags flags, ...) | |
125 | { | |
126 | va_list va; | |
127 | ||
128 | if (SCM_UNLIKELY (!(flags & SCM_ALLOW_NON_KEYWORD_ARGUMENTS) | |
129 | && scm_ilength (rest) % 2 != 0)) | |
130 | scm_error (scm_keyword_argument_error, | |
131 | subr, "Odd length of keyword argument list", | |
132 | SCM_EOL, SCM_BOOL_F); | |
133 | ||
134 | while (scm_is_pair (rest)) | |
135 | { | |
136 | SCM kw_or_arg = SCM_CAR (rest); | |
137 | SCM tail = SCM_CDR (rest); | |
138 | ||
139 | if (scm_is_keyword (kw_or_arg) && scm_is_pair (tail)) | |
140 | { | |
141 | SCM kw; | |
142 | SCM *arg_p; | |
143 | ||
144 | va_start (va, flags); | |
145 | for (;;) | |
146 | { | |
147 | kw = va_arg (va, SCM); | |
148 | if (SCM_UNBNDP (kw)) | |
149 | { | |
150 | /* KW_OR_ARG is not in the list of expected keywords. */ | |
151 | if (!(flags & SCM_ALLOW_OTHER_KEYS)) | |
79a9a2c2 LC |
152 | scm_error_scm (scm_keyword_argument_error, |
153 | scm_from_locale_string (subr), | |
154 | scm_from_latin1_string | |
155 | ("Unrecognized keyword"), | |
156 | SCM_EOL, scm_list_1 (kw_or_arg)); | |
a16d4e82 MW |
157 | break; |
158 | } | |
159 | arg_p = va_arg (va, SCM *); | |
160 | if (scm_is_eq (kw_or_arg, kw)) | |
161 | { | |
162 | /* We found the matching keyword. Store the | |
163 | associated value and break out of the loop. */ | |
164 | *arg_p = SCM_CAR (tail); | |
165 | break; | |
166 | } | |
167 | } | |
168 | va_end (va); | |
169 | ||
170 | /* Advance REST. */ | |
171 | rest = SCM_CDR (tail); | |
172 | } | |
173 | else | |
174 | { | |
175 | /* The next argument is not a keyword, or is a singleton | |
176 | keyword at the end of REST. */ | |
177 | if (!(flags & SCM_ALLOW_NON_KEYWORD_ARGUMENTS)) | |
79a9a2c2 LC |
178 | scm_error_scm (scm_keyword_argument_error, |
179 | scm_from_locale_string (subr), | |
180 | scm_from_latin1_string ("Invalid keyword"), | |
181 | SCM_EOL, scm_list_1 (kw_or_arg)); | |
a16d4e82 MW |
182 | |
183 | /* Advance REST. */ | |
184 | rest = tail; | |
185 | } | |
186 | } | |
187 | } | |
188 | ||
fca75708 MD |
189 | void |
190 | scm_init_keywords () | |
191 | { | |
e7efe8e7 | 192 | keyword_obarray = scm_c_make_hash_table (0); |
a0599745 | 193 | #include "libguile/keywords.x" |
fca75708 MD |
194 | } |
195 | ||
89e00824 ML |
196 | |
197 | /* | |
198 | Local Variables: | |
199 | c-file-style: "gnu" | |
200 | End: | |
201 | */ |